Kingfish

PS. The new Deltec HOB skimmer that I saw at macna is available and can handle a 90g tank for $239

http://www.deltecusa.us/proteinskimmers/mce300.php

This hobby is like any other, you get what you pay for, period. But to play devils advocate, a skimmer is just a clear tube with a pump and some air bubbles. The reason expensive skimmers are such is due to materials and engineering. Cheap skimmers use extruded rather than cast materials. They are press molded not hand assembled. But most importantly the pumps used on cheap skimmers such as: Via aqua, Rio, Cap, etc have thinner layers of epoxy covering the copper coils in the pump head. These thin layers of epoxy can easily crack leaking stray voltage and copper into your aquarium. Just an FYI.

Reefman, As far as a new skimmer goes, a coralife would be an improvement over the prizm. At macna, Deltec released their new hang on the back skimmer that retails for $239. You might consider it if you don't want to install a sump system.